When a massive sinkhole mysteriously opens in Los Angeles, it tears a family in half, separating mother and son from father and daughter. When part of the family finds themselves in an unexplainable primeval world, alongside a disparate group of strangers, they must work to survive and uncover the mystery of where they are and if there is a way back home.

A new girl in a quiet town, Tess tries to manage her psychosis while adjusting to her new life with her mom. After stumbling upon the shrine of Lucy, a hit and run victim, Tess finds herself overwhelmed by hallucinations of the dead girl and starts to question her sanity again. When the spirit possesses Tess’s mind and soul, mother and daughter are at a loss for where to turn next for salvation: religion or medicine? Both institutions have failed them to date but faith leads them to the house of Sarah, Lucy’s mother, who has been despondent since the accident. All together with time working against them, Sarah is desperate to believe that Lucy is still alive in Tess but neither parent wants to give up on their daughter. Now that she understands what is happening to her, ultimately Tess must decide whether she wants to keep fighting or succumb to her affliction.